Sink



FIG. 1 is a top, front perspective view of a sink according to our newdesign;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the left side, right sideand rear elevational views thereof being identical to the front shown;and,

FIG. 4 is a bottom plan view thereof.

The broken line representations in the figures are for the purpose ofillustration only, and form no part of the claimed design.

The ornamental design for a sink, as shown and described.